Rev. R. T. Lowe on two new Madeiran Land-Shells. 339 



that it is only known at present in a dead or semifossil state. 

 The specimens, however, for three of which I am indebted to 

 the Uberality of the Baron de Paiva, are in excellent condition 

 as to form and sculpture, though completely colourless. Two 

 of them are even partially semitranspai'ent or opake milky hya- 

 line, like H. coronata, Desf. They were obtained last spring in 

 the South Deserta (Bugio), by a person employed as a collector 

 by the Baron, whose note upon them states, " in rupibus sub- 

 inaccessis.^' It is perhaps more probable, however, that they 

 were found in the fossil deposit at the top of the island, in which 

 H. curonula occurs. They must, at any rate, be very rare or 

 local to have escaped the observation of Mr. Leacock and myself 

 in 1849, and again of Mr. Wollaston and myself in 1855. 



2. Clausilia ubesiuscula. 



T. subrimata, fusiformis, tenuiuscula, subabbreviata, obesiuscula, ob- 

 tusa, fusco-castanea, cinereo submaculata v. strigillata, nitidius- 

 cula, tenuiter creberrimeque longitudinaliter striata ; spira apice 

 obtusa, ssepe decorticata, nee gracili producta ; anfr. S-8^, planu- 

 latis, ultimo ad basin v. cervicem unicanaliculato, varice colu- 

 mellari distincto, baud cristato ; apertura ut in C. deltostomate, 

 lamellis plicisque peristomateque tenuioribus. 



Long. 10-1 1|, lat. 2k mill, ; apert. 2| longa, 2 lata. 



Hab. in Madera prope Cam90 secus aquseductum " Levada Debaixo" 

 dictum, supra " Kib. do Porto Novo," sub foliis Sempervivi glaU' 

 dulosi (Ait.), Maio 1863, invenit S^ J. M. Moniz. 



Intermediate between C. deltostoma and C. exigua, Lowe, with 

 the tine close-crowded striae of the latter. Size and shape more 

 of the former, but shorter and more obese, with a blunt spire 

 not slender or drawn out upwards, and one or two fewer, rather 

 more flattened volutions, with the suture somewhat less de- 

 pressed, the longitudinal striae less prominent, distinct, and re- 

 mote, than even in var. /3, subvar. 1 ; the shell altogether more 

 glossy and shining, not grey or ash-colour, but brighter chestnut- 

 brown, speckled or blotched with grey; the two plaits of the 

 mouth less developed, and the whole peristome thinner than in 

 C deltostoma, /3, except in specimens of the latter from high 

 elevations (2000-3000 feet) remote from the coast, e. g. in the 

 Curral das Freiras. 



Possibly a mere local form or variety of the extremely poly- 

 morphous common Madeiran C deltostoma, though at present 

 I am inclined to agree with its discoverer, S' Moniz, in con- 

 sidering it distinct. Except in size and shape, it approaches 

 nearest to var. /S, subvar. 2, depauperata, of that variable species; 

 but it is a much larger and more obese or ventricose shell, 

 though agreeing with it in the number of its volutions and in 



